<!DOCTYPE html>
<html lang="zh-cn">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Title</title>
    <link rel="stylesheet" href="./css/16.css">
    <script src="./js/16.js"></script>
</head>
<body>
    <div class="box" onclick="printNameA()">
        divA
        <div class="box" onclick="printName('divB')">
            divB
            <div class="box" onclick="printName('divC')">
                divC
                <div class="box" onclick="printNameD(event)">
                    divD
                </div>
            </div>
        </div>
    </div>
</body>
</html>